Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 38, Issue 4, Pages 1529-1534Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2017.10.053
Keywords
BaAl2Si2O8; Sintering behaviour; Microwave dielectric properties
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Funding
- National Natural Science Foundation of China [NSFC-51572093, 51772107, 61771215]
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BaAl2-2x(ZnSi)(x)Si2O8 (x = 0.2-1.0) ceramics were prepared using the conventional solid-state reaction method. The sintering behaviour, phase composition and microwave dielectric properties of the prepared compositions were then investigated. All compositions showed a single phase except for x = 0.8. By substituting (Zn0.5Si0.5)(3+) for Al3+ ions, the optimal sintering temperatures of the compositions decreased from 1475 degrees C (x = 0) to 1000 degrees C (x = 0.8), which then slightly increased to 1100 degrees C (x = 1.0). Moreover, the phase stability of BaAl2Si2O8 was improved. A novel BaZnSi3O8 microwave dielectric ceramic was obtained at the sintering temperature of 1100 degrees C. This ceramic possesses good microwave dielectric properties with epsilon(r) = 6.60, Q x f = 52401 GHz (at 15.4 GHz) and tau(f) = -24.5 ppm/degrees C.
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